. Electric railway journal . its permanent surface with a mixtureof dry gravel and cement. A sufficient quantity ofcement is added to the gravel merely to make it possibleto tamp it firmly in position under the ties. The slightamount of surface water which later percolates throughthe pavement causes the mixture to set and form afairly good grade of concrete. In connection with the foregoing account, it is perti- nent to present a cross-section of the standard woodentie and T-rail concrete track construction for which theconcrete mixing and placing outfit described is engraving not on
. Electric railway journal . its permanent surface with a mixtureof dry gravel and cement. A sufficient quantity ofcement is added to the gravel merely to make it possibleto tamp it firmly in position under the ties. The slightamount of surface water which later percolates throughthe pavement causes the mixture to set and form afairly good grade of concrete. In connection with the foregoing account, it is perti- nent to present a cross-section of the standard woodentie and T-rail concrete track construction for which theconcrete mixing and placing outfit described is engraving not only shows the track construction indetail but also presents the specifications for the con-crete and the form of granite nose block. SIMPLE DOOR-OPERATING MECHANISM By the process of elimination the master mechanic ofthe Kalamazoo (Mich.) Street Railway has reduced hisdoor-operating mechanism to a very simple form. Atfirst this mechanism consisted of the usual crank andhandle, with a combination of bell cranks under the ves-. Simplified Door-Operating Lever, Kalamazoo tibule floor and just under the bonnet. As shown in theillustration, the simplified mechanism consists of noth-ing more than a handle applied at the pin which con-nects the pivoted lever attached to the door and the onebolted to the front of the vestibule. By making thesepivoted levers slightly tight in the straight-line posi-tion, the motorman is able to press the handle beyondcenter, which serves to lock the door in the closed posi-tion. To open and close the vestibule door the motor-man must shift his position a little, which makes itpractically impossible for him to close the door andstart the car simultaneously. At the meeting of the Hastings & District Electric-Tramways, Ltd., Hastings, England, G. Kitchin, whopresided, said that last May he told the directors thatthe bill for the substitution of the overhead system ofelectric traction for the Dolter surface-contact systemhad been rejected by the House of Lor
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